Production of oxygen compounds of nitrogen from ammonia.



UNITED STATES PATENT OFFICE.

PROD'UOTIGN 01:" DXYG-EIQ' CGMPUUNLEJ'E 01:" IJICIPRGGEN FRJJM.FLIMLMGN'IA.

1,222 928 lpecilimtion of Letters l'atonl N0 Drawing. Application filed.December 16, 2915,

To all whom it may concern:

Be it known that L NILS lio'svoiio, :1 sol"- 1861} of the King ofNorway. rosi in; at R ukan, Norway, huvo invoutocl col-tam new anduseful [IIIPIOVBHIEIHS in. tho lh'iinilimuon of Oxygcn Compounds ofNitrogen Ammonia" and I do hcroh clcclunr tho lowing to ho aliull,01cm", and l-XrlCl. icon of tho .lllVGl'ilTLOI'l. such. as w ll tains tomain: and use This invui'itiou icicles to the production of oxygencompounds of nitrogen from monia by moons of: oxidation in the presenceof c cataf l; and. has for its object 1: process by men. s of which theon of such oxidation is considerably incl i l In processes for theoxidation o'li cm. i by means of air 01' other gases containing oxygenin the presence of catalysts so (1S to produce nitrogen oxygen compoundslosses will take place'for the reason thotipaz-t of the ammoniav is notoxidized further than to produce free nitrogen.

It is known that such losses are reduced by carrying out the process insuch manner that the gas mixture remains in contact with the catalystfor n vary short. timoonly, Even when working in this manner it has notbeen possible however to attain a quom titativc oxidation of tho ammoniointo nitrogen oxygon compounds at, least not. when the process iscnrricrl out on on inductrial scale.

To furtl'icr increase tho outputit has hcou Proposed to effect theoxidation under on lncreasecl pressure and it" has been consirL ered asbeing of special importance that the gas mixture on leaving the catalystis still under a considerable pressure (such a proc- 4 ess beingdescribed for instance, in the Non wegian potent specification No. 26037to Vorein Chcmisohor Fahrikon in Mannheim) Bymcans of experiments theapplicant has now ascertained that in contradiction to the principle ofthis known process a considorable improvement of the output is obtainedwhen the oxidized gas mixture is caused to leave the catalyst at a lowerpressure than that of the atmosphcro. The pres-- ent invention is nowbased upon this observation and accordingly consists in worlcing 'i'uitm'itoil Alon. 17, 1917.

Serial No. 07,2359.

un-iloisuch com itions that the goo lcuving tho cul'ulyst is maintainedunder n ]I))( SSI.1L'0 lower than that of th a :ili'nosphci'o. In prioroxpcriisicnts to clinch no i'zxi ilutiou or comhustion oi? mnn'mulu ogrout lillsrcnoc hotwoon tho pli'ossiic in front of the catalyst and intl-- GELV'll r the mtulyst has in SGVQill. uso of so that :1, 1 l 1,.icc .10 Lip 31 .it when tho tho catalyst hero it not i ich largo fallsof in when t. uucclot a prcssurc bolas. lil c otmospl1.ero," ,u fall ofprcssui'o of loss than moi, (mercurial column will in ll'lucb cases hesuilicicnl, to obtain, u pmcticslly quantitative combustion that. onoutput of about 98-400 per cent In the procoslj 11g olc;-scri ;tion.thc'oxpression catalyst is meant to covcimaterials" sists in passing itgas mixture containing umn'ionia. out} on ygcn through. :1 layer of o,atalytic agent vn such :1, mm'mczi that the pressure in the. his lcuvingthe catalyst is lower than that of the nfim'ysphcro the fall. ofprcssm'c in th: catalyst being at tho sumo time loss than fill mm.I1'll'lCli,il2Ll column In testimony hat Il claim tho 'h'n'egoing as myinv ution l have signed my name in presence of two subscribingwitnesses.

NILS BUSVOLD. Wit-n Ml F. (ll-'ummnMAN, (J. Fncmo :irs HA N

